CN204455150U - A kind of hyperchannel multipaths heat exchanger for cinder - Google Patents

Abstract

The utility model discloses a multi-channel and multi-process blast furnace slag flushing water heat exchanger, which relates to heat exchange equipment for heating secondary water by recovering waste heat of blast furnace slag flushing water, comprising two slag flushing water pipe boxes arranged at two ends, two sides There are two secondary water pipe boxes, a pair of flushing slag water connecting pipes and secondary water pipes arranged at the upper and lower ends, and several heat transfer plates arranged between the slag flushing water pipe box and the secondary water pipe box, and the heat exchange plate bundle One end of one end is provided with a segmental partition that cuts off the corresponding slag flushing water pipe box, and the interlayer pipe box located on the end face of the heat exchange unit is asymmetrically arranged in the secondary water pipe box; compared with the prior art, the heat exchange of the utility model A multi-channel slag flushing water flow path is formed by setting a partition between the heat transfer plate bundles, and a multi-channel multi-process secondary water flow path is formed by setting a sandwich tube box in the heat exchange unit, so that the heat of the slag flushing water The release is more sufficient, the flow resistance of the secondary water is smaller, the heat transfer efficiency is higher, and the heat exchange between the secondary water inside and outside the heat exchanger is promoted faster.

Description

A multi-channel multi-process blast furnace slag flushing water heat exchanger

technical field

The utility model relates to the technical field of heat exchangers, in particular to a multi-channel and multi-process blast furnace slag flushing water heat exchanger.

Background technique

Blast furnace ironmaking produces a large amount of high-temperature slag, and after water quenching, a large amount of slag washing water at 60-90°C is produced. Since the slag washing water contains solid particles and suspended matter, direct heating will cause silting or blockage in the pipes and radiators of the heating system , generally requires indirect heat exchange through a heat exchanger.

The heat exchanger is generally divided into several slag flushing water baffle channels through partitions, and the secondary water is deflected in the slag flushing water baffle channels to absorb the heat of the slag flushing water. The existing internal heat exchange structure of the heat exchanger is relatively simple. , in order to fully release the heat of the slag-washing water, the number of folds in the slag-washing water baffle channel is generally large, and the number of folds in the secondary water baffle channel is the same as that of the slag-washing water baffle channel , increase the resistance of the secondary water flow, reduce the secondary water flow for internal and external convection to transport heat, and the heat exchange efficiency needs to be further improved.

Utility model content

The purpose of the utility model is to provide a multi-channel and multi-process blast furnace slag flushing water heat exchanger with small secondary water circulation resistance and high heat exchange efficiency.

The technical scheme of the utility model is achieved in this way, a multi-channel multi-process blast furnace slag flushing water heat exchanger, including two slag flushing water pipe boxes arranged at both ends, two secondary water pipe boxes arranged on both sides, and located at A pair of slag flushing water connection pipes located on the slag flushing water pipe box at the upper and lower ends, a pair of secondary water connection pipes arranged diagonally on the secondary water pipe box at the upper and lower ends, and the heat exchange between the slag flushing water pipe box and the secondary water pipe box The plate bundle, the heat exchange plate bundle includes a plurality of horizontally placed heat transfer plates, one side of the heat transfer plate is the slag flushing water flow channel and the other side is the secondary water flow channel, the slag flushing water flow channel and the secondary water flow channel alternate in turn, There is no contact point between the heat transfer plates on the side of the slag flushing water flow channel, and one end of the heat exchange plate bundle is provided with a segmented partition that cuts off the corresponding slag flushing water pipe box, and the segmented partition makes each group of heat transfer plate bundles The slag flushing water flow channel is folded at the slag flushing water pipe boxes at both ends of the heat exchange plate bundle, and a multi-channel non-contact heat exchange process for slag flushing water is formed. The sandwich tube box on the end face of the heat unit, and the sandwich tube boxes arranged at intervals on both sides make the secondary water channel in the heat exchange unit form. The multi-channel secondary water heat exchange process flowing out of the confluence port at the other end of the heat exchange unit. The number of folds in the secondary water heat exchange process is an odd number. It communicates with another secondary water pipe box provided with a water outlet.

Further, a flat cover for the slag flushing water pipe box is provided on the outside of the slag flushing water pipe box at both ends.

Further, the flat cover of the slag flushing water pipe box is provided with a cleaning nozzle, and the cleaning nozzle cover is provided with a cleaning cover.

Further, the slag flushing water pipe box is provided with a partition plate for the slag flushing water pipe box, and a partition plate is set at the corresponding position of the first secondary water flow channel of the heat exchange plate bundle from the slag flushing water pipe box, and the corresponding second secondary water channel in the slag flushing water pipe box at the other end The position of the secondary water flow channel is not provided with a partition, and the corresponding position of the secondary water channel in the next slag flushing water pipe box is set oppositely.

Further, the heat transfer plate is provided with corrugations, the corrugations have no contact points on the side of the slag flushing water flow channel, and the corrugations have several contact points on the side of the secondary water flow channel.

Further, the width of the slag flushing water channel formed between the heat transfer plates is larger than the width of the secondary water channel.

Compared with the prior art, the multi-channel and multi-process blast furnace slag flushing water heat exchanger of the utility model has partitions between the heat transfer plate bundles composed of a plurality of heat transfer plates to form multi-channels that can be baffled. The slag flushing water flow channel and the heat exchange unit composed of multiple heat transfer plates are equipped with interlayer pipe boxes to form a multi-channel and multi-process secondary water flow channel that can be baffled and diverted, so that the heat of the slag flushing water can be released more fully. , the flow resistance of the secondary water is smaller, the heat transfer efficiency is higher, and the secondary water inside and outside the heat exchanger is promoted to conduct faster heat exchange.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Fig. 1 is a structural schematic diagram of a multi-channel multi-process blast furnace slag flushing water heat exchanger of the present invention.

Fig. 2 is a flow chart of the slag flushing water of the multi-channel and multi-process blast furnace slag flushing water heat exchanger of the present invention.

Fig. 3 is a secondary water flow chart of the multi-channel and multi-process blast furnace slag flushing water heat exchanger of the present invention.

Fig. 4 is a flow channel diagram of the multi-channel and multi-process blast furnace slag flushing water heat exchanger of the present invention.

In the picture:

1. Flat cover of slag flushing water pipe box; 2. Flange end face; 3. Slag flushing water connection; 4. Secondary water connection; 5. Compression plate; 6. Tie rod; 7. Blocking strip; 8. Heat transfer plate ; 9, slag flushing pipe box partition; 10, interlayer pipe box; 11, slag flushing water channel; 12, secondary water flow channel; 13, slag discharge pipe; 131, pipe body; 132, slag discharge slope; Slag valve; 134, slag discharge handle; 14, cleaning nozzle; 101, slag flushing water pipe box; 102, secondary water pipe box; A, slag flushing water; B, secondary water.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

As shown in Figure 1-4, a multi-channel and multi-process blast furnace slag flushing water heat exchanger includes two slag flushing water pipe boxes 101 arranged at both ends, two secondary water pipe boxes 102 arranged on both sides, and upper and lower A pair of slag flushing water connection pipes 3 located on the slag flushing water pipe box 101 at both ends, a pair of secondary water connection pipes 4 located on the secondary water pipe box 102 on the upper and lower diagonals, and a pair of secondary water connection pipes 4 arranged on the slag flushing water pipe box 101 and the secondary water pipe box 101. Several heat exchange plate bundles and blocking strips 7 between the water pipe boxes 102, the heat exchange plate bundle includes a plurality of horizontally placed heat transfer plates 8, one side of the heat transfer plate 8 is the slag flushing water flow channel 11, and the other side is The secondary water flow channel 12, the slag flushing water flow channel 11 and the secondary water flow channel 12 alternate in turn, there is no contact point between the heat transfer plates 8 on the side of the slag flushing water flow channel 11, and the slag flushing water pipe box 101 is equipped with segmented partitions Each set of slag flushing water channels 11 formed in the heat exchange plate bundle is folded through the slag flushing water pipe box 101 connected to both ends of the heat exchange plate bundle to form a non-contact multi-channel or single-channel slag flushing water heat exchange process ;

A plurality of parallel heat transfer plates 8 form a heat exchange unit, and interlayer tube boxes 10 located on the end faces of the heat exchange unit are arranged asymmetrically at intervals in the secondary water tube boxes on both sides. The secondary water channel forms a multi-channel secondary water heat exchange process that flows from the diversion port at one end of the heat exchange unit to the interlayer tube box 10 at both ends of the heat exchange unit and then flows out from the confluence port at the other end of the heat exchange unit. It communicates with a secondary water pipe box with a water inlet, and the confluence port communicates with another secondary water pipe box 102 with a water outlet. In order to facilitate diversion and confluence, the number of folds in the secondary water heat exchange process is an odd number The secondary water connecting pipe 4 of the inlet is arranged on a secondary water pipe box 102 , and the secondary water connecting pipe 4 of the inlet of the outlet is arranged on another secondary water pipe box 102 .

The heat exchange plate bundle of the multi-channel slag flushing water process is composed of two pairs or more of heat transfer plates 8, which are realized by setting the slag flushing water pipe box partition 9 in the slag flushing water pipe box 101, and the first time since the slag flushing water connection pipe 3 The corresponding position of the secondary water flow channel 12 between the outermost pair of heat transfer plates 8 of a group of heat exchange plate bundles is provided with a partition that cuts off the slag flushing water pipe box 101 at one end, and the corresponding two in the slag flushing water pipe box 101 at the other end. There is no partition at the position of the secondary water flow channel 12, and the corresponding positions of the secondary water flow channels 12 of the next group of heat exchange plate bundles are set oppositely and alternately; during operation, the slag flushing water A enters the slag flushing water pipe box 101 through the slag flushing water connecting pipe 3 , lead to the heat transfer plate 8 through the partition plate 9 of the slag flushing water pipe box, exchange heat with the secondary water B, and reach the slag flushing water pipe box 101 at the other end, and carry out the folding process through the slag flushing water pipe box partition 9, after several times of folding The slag flushing water flows out of the heat exchanger through the connection pipe 3 of the slag flushing water; during the whole heat exchange process, the slag flushing water flows through each set of slag flushing water flow channels 11 and is folded, that is, all the slag flushing water flow channels 11 are connected into a multi-channel one Slag flushing water heat exchange process.

The multi-channel and multi-process secondary water heat exchange process is realized through the sandwich pipe box 10. The heat exchange unit includes a set of heat transfer plates 8, and each set of heat transfer plates 8 in the multi-channel heat exchange process consists of two or more pairs of heat transfer plates. Composed of plates 8, one end of the first group of heat transfer plates 8 of the first heat exchange unit from the secondary water connection pipe 4 is open, that is, the secondary water flow channel between the heat transfer plates 8 and the secondary water pipe at the water inlet end The box 102 is connected, as shown in Figure 3, assuming that this end is the left end, the right end of the first few heat transfer plates 8 is provided with a closed sandwich tube box 10, and the sandwich tube box 10 is connected to the previous group of heat transfer plates 8 and the right end face of the next group of heat transfer plates 8, so that the secondary water B is deflected in it, and the left end of the next group and another group of heat transfer plates 8 is provided with a sandwich tube box 10, and the secondary water B is folded again After an odd number of deflections, it flows out from the confluence port at the right end of the last group of heat transfer plates 8 of the first heat exchange unit, and the secondary water B enters the primary and secondary water pipe box 102 from the secondary water connection pipe 4 of the water inlet Afterwards, the flow is divided into each heat exchange unit, and collected to another secondary water pipe tank 102 by the confluence port of each heat exchange unit, and multiple heat exchange units form multiple parallel heat exchange processes.

Wherein, two slag flushing water pipe boxes 101 are respectively located at both ends of the heat exchange plate bundle. When the number of slag flushing water folding distances is an odd number, the imported slag flushing water connecting pipe 3 is arranged at the upper end of one slag flushing water pipe box 101, and the outlet one The slag flushing water connecting pipe 3 is arranged at the lower end of another slag flushing water pipe box 101. If the slag flushing water folding number is an even number, the slag flushing water connecting pipe 3 of the inlet and outlet is arranged on the same slag flushing water pipe box 101.

The secondary water pipe box 102 is arranged diagonally on both ends of the heat exchange unit, and of course it can also be arranged on the same side, but the diagonally arranged secondary water pipe box 102 can make the distribution of the secondary water in the plate more uniform; when When arranged diagonally, the secondary water B enters the secondary water pipe box 102 through the secondary water connecting pipe 4 and is introduced into the heat transfer plate pair, and after exchanging heat with the slag washing water A, it reaches the diagonal secondary water pipe box 102, and enters again after folding The heat transfer plate conducts heat exchange internally, and flows out of the heat exchanger through the secondary water connecting pipe 4 after being deflected several times.

In this example, the heat transfer plates 8 of the heat exchange plate bundle are placed horizontally, and corrugations can be set on the plates. Every two plates are paired and welded to form a plate pair. The secondary water flow channel 12 is formed inside the plate pair, and the secondary water flow of the plates There are fixed contacts on both sides of the channel 12, and these contacts can be under pressure after spot welding; of course, the plate can also be realized without corrugation by using a bare plate by setting welding ribs or connecting columns on the side of the secondary water channel , but the heat transfer efficiency is low; multiple sets of heat transfer plate pairs are stacked and welded to form a plate bundle through the support of the blocking strips 7 on both sides, and are clamped and fixed on the shell 2 by the compression plate 5 and the tie rod 6 connected to the heat transfer plate , the slag flushing water flow channel 11 is formed between the plate pairs, which is supported by the blocking strip 7 between the plate pairs, and the heat transfer plate 8 has no contact point on the side of the slag flushing water flow path 11; wherein, the blocking strip 7 support can also pass the heat transfer The sides of the plates 8 are directly turned over and joined together.

In this embodiment, in order to solve the problems of silt removal and blockage dredging, there are slag water pipe box flat covers 1 on the outside of the two slag flushing water pipe boxes 101 pairs. Some flange end faces are connected with 2 screws. Opening the flat cover 1 of the slag flushing water pipe box can clean and dredge the various slag flushing water flow channels 11 conveniently and quickly. Therefore, it is difficult to load and unload. The cleaning water port 14 is provided on the outer surface of the slag flushing water pipe box flat cover 1. The cleaning water port 14 is provided with a cleaning cover through a buckle-type cover, and clean water can be poured into the cleaning water port 14 to clean the inside of the heat exchanger. Rinse.

In this embodiment, the width of the slag flushing water channel 11 of the heat exchange plate bundle is greater than the width of the secondary water channel 12 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (6)

1. A multi-channel and multi-process blast furnace slag flushing water heat exchanger is characterized in that it includes two slag flushing water pipe boxes arranged at both ends, two secondary water pipe boxes arranged on both sides, and two flush water pipe boxes arranged at the upper and lower ends. A pair of flushing slag water connection pipes on the slag water pipe box, a pair of secondary water connection pipes arranged diagonally above and below the secondary water pipe box, and a heat exchange plate bundle arranged between the slag flushing water pipe box and the secondary water pipe box, said The heat exchange plate bundle includes a plurality of horizontally placed heat transfer plates. One side of the heat transfer plate is the slag flushing water flow channel and the other side is the secondary water flow channel. The slag flushing water flow channel and the secondary water flow channel alternate in turn. There is no contact point between the heat transfer plates on the side of the slag water flow channel. One end of the heat exchange plate bundle is provided with a segmented partition that cuts off the corresponding slag flushing water pipe box. The segmented partition makes each heat transfer plate bundle A group of slag flushing water flow channels are folded at the slag flushing water pipe boxes at both ends of the heat exchange plate bundle, and a multi-channel non-contact heat exchange process for slag flushing water is formed; multiple parallel heat transfer plates form a heat exchange unit. The interlayer pipe box on the end face of the heat exchange unit is arranged at intervals and asymmetrically in the secondary water pipe box on both sides. The interlayer pipe box forms the secondary water channel in the heat exchange unit from the diversion port at one end of the heat exchange unit to its After the sandwich tube boxes at both ends are folded multiple times, the multi-channel secondary water heat exchange process flows out from the confluence port at the other end of the heat exchange unit. The number of folds of the secondary water heat exchange process is an odd number, and the The diversion port communicates with a secondary water pipe box provided with a water inlet, and the confluence port communicates with another secondary water pipe box provided with a water outlet. 2. The multi-channel and multi-process blast furnace slag flushing water heat exchanger according to claim 1, characterized in that: the outer sides of the slag flushing water pipe boxes at both ends are provided with flat covers for the slag flushing water pipe boxes. 3. The multi-channel and multi-process blast furnace slag flushing water heat exchanger according to claim 2, characterized in that: the flat cover of the slag flushing water pipe box is provided with a cleaning nozzle, and the cleaning nozzle cover is provided with a cleaning cover. 4. The multi-channel and multi-process blast furnace slag flushing water heat exchanger according to claim 1, characterized in that: the slag flushing water pipe box partition is arranged in the slag flushing water pipe box, and the heat exchange plate is connected from the slag flushing water pipe. A partition is set at the corresponding position of the first secondary water flow channel of the beam, no partition is set at the corresponding position of the secondary water flow channel in the slag flushing water pipe box at the other end, and the corresponding position of the secondary water channel in the next slag flushing water pipe box is set oppositely. 5. The multi-channel and multi-process blast furnace slag flushing water heat exchanger according to claim 1, characterized in that: the heat transfer plates are provided with corrugations, the corrugations have no contact points on the side of the slag flushing water flow channel, and the corrugations are on the two sides of the slag flushing water flow channel. There are several contact points on one side of the secondary water channel. 6. The multi-channel and multi-process blast furnace slag flushing water heat exchanger according to any one of claims 1 to 4, characterized in that: the width of the slag flushing water channel formed between the heat transfer plates is larger than that of the secondary water flow track width.